Method for producing fiber spun yarns and the fiber spun yarns obtained with said method

Abstract

Method for producing a fiber spun yarn of the type in which parallelized elementary fibers are joined to a textile core, subjected to a false twist, said fibers being projected on the core, upstream of the false twist spindle. According to the invention, in the fibers projection zone, the core is guided into a channel with an open face which is situated in facing relation to the elementary fibers projection zone and the surface of which is subjected to a flow of fluid tending to exert a pulling force on the end of the fibers.

What is claimed is: 
     
       1. A method for producing a spun fiber yarn upstream of a false twist spindle, comprising: (a) providing a textile core comprising a single yarn;   (b) guiding said core tangentially into a V-shaped channel having an open face and a bottom, said open face of said channel facing a parallelized elementary fibers projection zone;   (c) providing parallelized elementary fibers in said parallelized elementary fibers projection zone, said parallelized elementary fibers being projected on and joined to said textile core; and   (d) subjecting said bottom of said channel to a flow of fluid to exert a pulling force on said parallelized elementary fibers.   
     
     
       2. The method of claim 1, wherein said textile core comprises a continuous multifilament yarn. 
     
     
       3. The method of claim 2, wherein said continuous multifilament yarn core is introduced into a rove of fibers upstream of said parallelized elementary fibers projection zone. 
     
     
       4. The method of claim 1, wherein the bottom of said channel is provided with orifices and is subjected to suction causing a flow of fluid on the surface of said channel. 
     
     
       5. The method of claim 1, further comprising, providing a crossed-belt type false twist spindle and wherein said parallelized elementary fibers are projected by a licker-in. 
     
     
       6. A spun fiber yarn obtained by the method of claim 1, wherein said yarn comprises a single yarn core covered with discontinuous fibers, said discontinuous fibers being firmly entrapped, held in position and distributed around said core while retaining a real twist around the core, said core being virtually twist-free. 
     
     
       7. The spun yarn of claim 6, wherein said core comprises a multifilament continuous yarn. 
     
     
       8. The spun yarn of claim 6, wherein said core comprises a spun fiber yarn having an internal multifilament continuous core.